What does Buddhism mean by heaven and earth opening heaven?

Tiancang Day is also called warehouse exploration day, warehouse exploration day and warehouse exploration festival. It is the 25th day of the first month every year, which is an ancient festival that farmers generally observe. It is the early morning of this day (before the sun rises) that you draw several big circles in your yard with plant ash or ashes of fire, and put all kinds of grains in the middle of the circle, which symbolizes the bumper harvest this year, which means good weather and good weather, and pray for the gift of God. Because it is a custom to set off firecrackers after the first day of the first lunar month, it is generally after this festival (followed by the dragon raising its head on February 2), which means that the new year has passed and it is necessary to start a new year's struggle.

I'm really ashamed of what happened in the warehouse that day. I don't know yet. According to the laws of the lunar calendar, it seems that there must be warehouses in the sky.

The opening dates of Shoukang Baojian's Tiandi warehouse are 25th of March, 20th of March, April 16, April 18, May 16, June 6th,1month16544.